The windows of shop at Boston Bomb site 1.. Blast defies physics !!

I believe this is one of the most important photographs published of the Boston attack. Captured a couple of metres from the point of blast...so why
has the glass not been blown in?...or did the supposed injured smash them from the inside to get to their positions.

You know, there were quite a lot of bodies between the bomb and the glass. Absorbing the shock and the projectiles is what caused the injuries. And
the bomb was on sidewalk level, so for the blast to knock out every window it would have had to have a clear upward wave which, again, was likely
absorbed on the sides by human bodies.

Originally posted by Aleister
You know, there were quite a lot of bodies between the bomb and the glass. Absorbing the shock and the projectiles is what caused the injuries. And
the bomb was on sidewalk level, so for the blast to knock out every window it would have had to have a clear upward wave which, again, was likely
absorbed on the sides by human bodies.

Actually if you look at the photographs of the injured you will see most were on this side of the bomb, especially those showing severe injury, and
not between the blast and window..

Blast wind: At the explosion site, a vacuum is created by the rapid outward movement of the blast. This vacuum will almost immediately refill
itself with the surrounding atmosphere. This creates a very strong pull on any nearby person or structural surface after the initial push effect of
the blast has been delivered. As this void is refilled, it creates a high-intensity wind that causes fragmented objects, glass and debris to be drawn
back in toward the source of the explosion.

Blast wind: At the explosion site, a vacuum is created by the rapid outward movement of the blast. This vacuum will almost immediately refill
itself with the surrounding atmosphere. This creates a very strong pull on any nearby person or structural surface after the initial push effect of
the blast has been delivered. As this void is refilled, it creates a high-intensity wind that causes fragmented objects, glass and debris to be drawn
back in toward the source of the explosion.

Blast wind: At the explosion site, a vacuum is created by the rapid outward movement of the blast. This vacuum will almost immediately refill
itself with the surrounding atmosphere. This creates a very strong pull on any nearby person or structural surface after the initial push effect of
the blast has been delivered. As this void is refilled, it creates a high-intensity wind that causes fragmented objects, glass and debris to be drawn
back in toward the source of the explosion.

Those are double paned glass and I'm pretty sure that the blast wave pushed on it causing it to spring inward and then after compressing the
air/nitrogen in between the panes, the glass was popped back out when the inner pane gave way and the outer pane shot outward as it rebounded. Don't
forget these windows are tempered glass so they will stress fracture all over and I believe they fractured on the bend inward and completed broke on
the spring-back.

There is glass on both sides of the storefront wall and I am not surprised.

Blast wind: At the explosion site, a vacuum is created by the rapid outward movement of the blast. This vacuum will almost immediately refill
itself with the surrounding atmosphere. This creates a very strong pull on any nearby person or structural surface after the initial push effect of
the blast has been delivered. As this void is refilled, it creates a high-intensity wind that causes fragmented objects, glass and debris to be drawn
back in toward the source of the explosion.

Blast wind: At the explosion site, a vacuum is created by the rapid outward movement of the blast. This vacuum will almost immediately refill
itself with the surrounding atmosphere. This creates a very strong pull on any nearby person or structural surface after the initial push effect of
the blast has been delivered. As this void is refilled, it creates a high-intensity wind that causes fragmented objects, glass and debris to be drawn
back in toward the source of the explosion.

The intital blast would have pushed the glass in a blast dosnt attract, I disagree totally with the premise that a blast sucks glass in.

Respects

Sorry, but it happens. As the article states a vacuum is made, which causes air to rush back in.

While that's true, the initial blast is far stronger, and by the time the vacume starts pulling back, any objects in the initial blast will be too
far away.

I dont see anything suspicious in the picture though.

edit on 21-4-2013 by VoidHawk because: (no reason given)

I'm not an expert to say, just that I've read it occurs on this site and others. I think that question has been asked many times at other blast
sites, thus why I believe they included glass in the description.

I tried cutting tempered glass. I scored it and was tapping it to get it to crack along the line. I was tapping it pretty hard and a lot of times,
it got a lot of energy built up within it's structure. Finally it blew into a bunch of little crystals and they danced on the floor for about fifteen
minutes. We were laughing about this, then they were starting to stop. When we walked up to them we gave them more energy from our walking and they
started hopping around again.

Tempered glass on these windows absorbed the energy and when something hit them, their crystal bond was overwhelmed and they broke into little tiny
pieces and fell down. I spent a lot of time researching this and thinking about this event in my life. I bet those pieces were hopping but maybe
noone saw them because their attention was on something else..

you constantly down what anyone has to say dont you? Ive seen it through alot of threads its a little annoying.
Any way you said a blast pulls stuff in right? Your only half right it will suck in after the blast so between the blast and all the shrapnel, as much
as the doctors said they were pulling out of people anyway, the window should have blew in to the store as it beaded.

Now if you look at how much space is between the ground and the bottom of the window if the glass went inward how would it be sucked back out through
atleast a half a foot of concrete? As for the window just dropping and landing on both sides most of the glass seems to have come outside so
percentage wise what are the chances of alot more of the glass to be on the outside and not in if the glass just had a straight drop.

The debate on whether the glass should be inside the shop or by some miracle all be outside is mute. The fact is this explosion should have blown the
window in and in doing so, even with creating a vacuum after the initial blast, there should have been way more glass on the shop floor.

That window was punched out and not by the explosion, that we can see happens on the side-walk.

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